2 - 6 Installation
b) Close the dryer control system enclosure cover
and tighten all cover latches.
CAUTION: Do not remove the factory programmed micro-
computer chip or any I.C. chip from the logic control circuit
board. Improper removal will cause irreparable damage to
these highly static-sensitive components. Damage to
these components will render the dryer control system in-
operative until replacement is accomplished by a Deltech
Field Service Engineer. Do not remove the program identi-
fication sticker from the microcomputer chip.
WARNING!
DIP switches within the control box have been preset
at the factory to conform to customer operating con-
ditions. Any tampering with DIP switches will void
warranty and may reduce the quality of the product
gas. Any adjustments of DIP switches should only be
made by a qualified Deltech Field Service Engineer.
2.10 Instrumentation
The following instrumentation helps in monitoring dryer op-
eration and performance. Instruments which are available
as options are so noted.
Fixed Cycle Electronic Timer Control
WARNING: Disconnect the main power
supply before removing this cover.
Power ON Light
Left Chamber
DRYING Light
Right Chamber
DRYING Light
Figure 2.2
Hydrobloc LS Series Electronic Timer Control
Indicating Panel
Power ON Light
The power ON light on the control panel indicates when the
dryer is turned on and operating.
Left Chamber DRYING Light
The Left Chamber DRYING light on the control panel indi-
cates when the left chamber is drying.
Right Chamber DRYING Light
The Right Chamber DRYING light on the control panel indi-
cates when the right chamber is drying.
Hydrobloc LS DEC Controller
Hydrobloc LS Series dryers are equipped with a micropro-
cessor system that controls the operation of all dryer func-
tions. The controller is programmed to operate on a
6minute cycle for -40°F pdp dryers (4 minute for -100°F pdp
dryers). The controller keeps the drying chamber on-line
for 3minutes (2 minutes for -100°F pdp) while simulta-
neously regenerating the off-line chamber. Indicators on
the controller (Figure 2.3) help in monitoring dryer opera-
tion and performance. Instruments which are available as
options are so noted.
Deltech Compu-Save Energy Management System
(Option B)
The optional DEC Compu-Save Energy Management Sys-
tem automatically adjusts dryer operation to compensate
for changes in operating conditions. Air samples are peri-
odically taken from within each vessel and passed over a
capacitance probe which senses both temperature and
relative humidity. The dew point of the air within the desic-
cant bed is then precisely determined. While the dryer
continues to operate on a fixed drying cycle, the regenera-
tion cycle will not be initiated until a predetermined set
point has been reached. Purge air consumption is reduced
to a minimum.
The DEC Compu-Save Energy Management System is ac-
tive when the Energy Management System LED indicator
is ON.
Figure 2.3
Hydrobloc DEC Indicating Panel
®
POWER ON
ACTIVE WARNING
VALVE FAILURE
Compu - Save